Re: deep packet inspection

2003-10-03 Thread Damien Miller
. Right now, one would still have to do tcp segment reassembly in userspace, but that isn't quite so bad... One can do most of this right now using rdr to a local proxy (and have the OS deal with reassembling the stream), but it isn't amazingly fast. Not that deep packet inspection is going

Re[2]: deep packet inspection

2003-10-03 Thread Alexey E. Suslikov
there is a sort of IDS called static. such IDS don't catch anomalies actually, but watching flow's normality so all other (than normal) traffic assumed to be anomalous. check out SANS reading room...

Re[2]: deep packet inspection

2003-10-03 Thread Alexey E. Suslikov
SPADE Spade stands for the Statistical Packet Anomaly Detection Engine. It is a Snort preprocessor plugin which sends alerts of anomalous packet through standard Snort reporting mechanisms. http://www.silicondefense.com/software/spice/index.htm

Re: deep packet inspection

2003-10-03 Thread Daniel Carneiro
In Linux Snort-Inline gets its packets from IPTables by libipq/ip_queue. How would a port of snort_inline get its packets from pf to userland and return it? I know that in FreeBSD you could do it by Divert socket. But I don't know of something like it in OpenBSD. What would be the best way?

deep packet inspection

2003-10-02 Thread casper
Hi, At the university i am working on a project where i have to implement deep packet inspection(payload inspection) with some firewall(i picked OpenBSD's pf), currently i am thinking about design and implementation of that. One of the most obvious options is to rdr packets to user-land proxy

Re: deep packet inspection

2003-10-02 Thread Cedric Berger
[EMAIL PROTECTED] wrote: Hi, At the university i am working on a project where i have to implement deep packet inspection(payload inspection) with some firewall(i picked OpenBSD's pf), currently i am thinking about design and implementation of that. One of the most obvious options is to rdr

Re: deep packet inspection

2003-10-02 Thread Henning Brauer
On Tue, Sep 30, 2003 at 04:23:45AM +, [EMAIL PROTECTED] wrote: At the university i am working on a project where i have to implement deep packet inspection(payload inspection) with some firewall(i picked OpenBSD's pf), currently i am thinking about design and implementation of that. One

Re: deep packet inspection

2003-10-02 Thread Daniel Carneiro
I also have to implement something like this, and I was wandering if I can make a userland program to read the packets from kernel land using ioctl insted of rdr? [EMAIL PROTECTED] wrote: Hi, At the university i am working on a project where i have to implement deep packet inspection(payload

Re: deep packet inspection

2003-10-02 Thread Cedric Berger
Daniel Carneiro wrote: I was wandering if I can make a userland program to read the packets from kernel land using ioctl insted of rdr? man tun man bpf

Re: deep packet inspection

2003-10-02 Thread Ed White
On Tuesday 30 September 2003 06:23, [EMAIL PROTECTED] wrote: What are possible ways of implementing payload inspection in kernel? How is it possible to pass data from kernel-space to user-space(with kernel being initiator of that transfer)? This is pretty funny, I'm writing something like

Re: deep packet inspection

2003-10-02 Thread Cedric Berger
Ed White wrote: On Tuesday 30 September 2003 06:23, [EMAIL PROTECTED] wrote: What are possible ways of implementing payload inspection in kernel? How is it possible to pass data from kernel-space to user-space(with kernel being initiator of that transfer)? This is pretty funny, I'm

Re[2]: deep packet inspection

2003-10-02 Thread Max Laier
What are possible ways of implementing payload inspection in kernel? ... And what's the point of writing that e-mail if you don't describe your atypical way? What's the point in writing follow-ups to this really OT thread at all? And my piece for the atypical way: Take a look at Net-/FreeBSDs